The SEP domain of p47 acts as a reversible competitive inhibitor of cathepsin LSoukenik, M., Diehl, A., Leidert, M., Sievert, V., Buessow, K., Leitner, D., Labudde, D., Ball, L.J., Lechner, A., Nagler, D.K., Oschkinat, H.
(2004) FEBS Lett 576: 358-362
- PubMed: 15498563
- DOI: https://doi.org/10.1016/j.febslet.2004.09.037
- Primary Citation of Related Structures:
- PubMed Abstract:
The solution structure of the human p47 SEP domain in a construct comprising residues G1-S2-p47(171-270) was determined by NMR spectroscopy. A structure-derived hypothesis about the domains' function was formulated and pursued in binding experiments with cysteine proteases. The SEP domain was found to be a reversible competitive inhibitor of cathepsin L with a Ki of 1.5 microM. The binding of G1-S2-p47(171-270) to cathepsin L was mapped by biochemical assays and the binding interface was investigated by NMR chemical shift perturbation experiments.
Forschungsinstitut für Molekulare Pharmakologie, Robert-Rössle Str. 10, D-13125 Berlin, Germany.